Improvement in dado-planes



c. a. MILLER (11. BAILEY.

Dado-Plane.

No: 165,356; Pqtentedluly6 ,l875.

N-PEIEHS, PHOTO UTHOGRAPHER. WASHlNGTON. u c.

CHARLES Gr. MILLER AND LEONARD BAILEY, OF NEW BRITAIN, CONNEC- TICUT;SAID MILLER ASSIGNOR TO SAID BAILEY.

IMPROVEMENT IN DADO-PLANES.

Specification forming part of Letters Patent No. 165,356, dated July 6,1875; application filed February 24, 1875. e

To all whom it may concern:

Be it known that we, OHAE Es G. MILLER and LEONARD BAILEY, of NewBritain, in the county of Hartford and State of Connecticut, haveinvented an Improved Dado, of which the following is a specification,reference being had to the accompanying drawings, where- Figure l is atop view. Fig. 2 is a left'side view. Fig. 3 is a front-end view.

The device is a joiners tool of that kind or class known as dados, andthe features of the invention are two innu1nber-first, a peculiargravitating guide, which is both laterally and vertically adjustable;and, second, a depthguide, made reversible, so that it can be used onthe right or the left side of the body of the tool.

The parts of the tool herein shown and described are metallic, exceptthat the knob or ball, which serves as a hand-grasp, may well be ofiron.

The letter a denotes the stock or body of the too], to the rear end ofwhich is fixed the handle a having the wooden knob or handgrasp Theletter 12 denotes the iron, so called; and c, the chisel or iron whichcuts or marks the sides of the groove, both the chisels running down thesame throat. The letter d denotes a depth-gage, attached to andvertically adjustable upon the side of the body a by means of theset'screws e e, for regulating the depth of the cut. This depth-gage isdetachable from'the left side of the body a, where it appears in thedrawings, and attachable in the same manner-to the right side by meansof the screws 6 e, which correspond in office and purpose to the screws6 e. The letters ff denote two rods rigid on the bar 9. These rods runthrough the sockets t in the body 05, and are set and held at a desiredpoint by the thumb-screws h h, thus making the side guide, about to bedescribed, laterally adjustableto and from the body a. The letter indenotes the side guide borne on the vertical rods n n, which run upthrough the sockets g" 9, having vertical play therein, and therebygiving the side guide m the same vertical play, the cap-screws n atpreventing the rods n n from falling down through and away from thesockets g. The manner of using this tool is shown in Fig. 3, the letter0 denoting a board with a groove, 0, cut therein, and the dado about toout another groove, the side guide m fitting against the side of thegroove 0, and resting on the bottom of the groove. As the chisel of thedado cuts deeper and deeper into the wood the side guide m remainsvertically stationary, the vertical play of the rods n n permittingthis. The side guide at is shown in the drawings upon the right side ofthe body a. It can be taken off or detached from this side and, beingturned end for end, attached upon the left side of the body a in aprecisely similar manner; and in such case the depth-guide d is takenoff the left side of the body and, being turned end for end, attached inprecisely similar manner to the right side.

We are aware that side guides are not new, nor do we mean to claim suchgenerally, but only the peculiar combination we describe, which allowsour side guide to remain stationary upon the bottom of a groove whilethe plane descends into the wood at another place-that is, a gravitatingside guide.

We claim as our invention- 1. The combination of the stock a, rods ff,bar g, sockets g g, rods n it, having free play, within limits,in'sockets g, and the guide m, all substantially as described.

2. The combination of the body a with the depth-gage d and side guide m,which can be used upon either side of the body a, substantially as shownand described.

CHARLES G. MILLER. LEONARD BAILEY.

Witnesses: 1

H. G. WILLIAMS, W. H. LINSLEY.

